I stopped for a while too, I couldn't deal with the crashes and one day I had a dizzy spell and I stopped, plus when I p/u my presc. it said might cause heart attack and stroke. Uh-uh no thanks. A couple of weeks ago there was a good show on PBS about ADHD and they were saying you have more of a chance of dying from aspirin than ritalin. I went back on it just cause the mornings were so hard, I'm just so depressed, I don't have the energy to do anything. The rit wakes me up anyway. I've been back on it a couple of days and I've been fine.